166995223 has 4 divisors (see below), whose sum is σ = 167367600. Its totient is φ = 166622848.

The previous prime is 166995217. The next prime is 166995251. The reversal of 166995223 is 322599661.

166995223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166995223 - 2¹⁷ = 166864151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166995223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166995823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185515 + ... + 186412.

It is an arithmetic number, because the mean of its divisors is an integer number (41841900).

Almost surely, 2^166995223 is an apocalyptic number.

166995223 is a deficient number, since it is larger than the sum of its proper divisors (372377).

166995223 is an equidigital number, since it uses as much as digits as its factorization.

166995223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372376.

The product of its digits is 174960, while the sum is 43.

The square root of 166995223 is about 12922.6631543192. The cubic root of 166995223 is about 550.6825938185.

The spelling of 166995223 in words is "one hundred sixty-six million, nine hundred ninety-five thousand, two hundred twenty-three".